Determining Whether a Hard Drive is Dead

I had a Fujitsu 2.5" SATA laptop hard drive die on my MacBook running Mac OS X 10.4.11 (by die, I mean I received the flashing question mark/folder, and Mac OS X wouldn't boot). I replaced the hard drive with a new one, and now I'm trying to recover my information from the "dead" drive.

I bought a Sabrent SATA/IDE to USB converter adapter. I hooked up my dead drive to the adapter, but none of my three computers recognized it - each computer runs a different operating system, so the dead drive was not recognizable under Windows XP, Windows Vista, and Mac OS X 10.4.11. The Sabrent adapter is not defective, as I tested it with an old 3.5" IDE hard drive and it worked.

When I plug the hard drive/Sabrent adapter into the Windows machines (XP and Vista) it recognizes that a USB Mass Storage Device has been connected, but I am unable to access the hard drive from Windows Explorer or Device Manager.

Essentially, I'm trying to determine whether the drive is completely dead. When I plug it into the Sabrent adapter, I can feel and hear it spinning, but I'm not sure if power = "not dead."

Any information would be incredibly appreciated!